return artifactUri;
    }

    public void setArtifactUri(String artifactUri) {
        this.artifactUri = artifactUri;
    }

    public String getWhy() {
        return why;
    }

    public void setWhy(String why) {
        this.why = why;
    }

    public String getError() {
        return error;
    }

    public void setError(String error) {

                    MetadataGraphVertex targetNode = e.getTarget();
                    targetNode.getMd().setArtifactScope(e.getScope());
                    targetNode.getMd().setWhy(e.getSource().getMd().toString());
                    visit(targetNode);
                }
            }
        }
        // -----------------------------------------------------------------------

                    if (entry.equals(v)) { // unless it's an entry point.
                        // currently processing the entry point - it should not have any entry incident edges
                        res.getEntry().getMd().setWhy("This is a graph entry point. No links.");
                    }
                } else {
                    // fill in domain md with actual version data
                    ArtifactMetadata md = v.getMd();

        this.createdTime = value;
    }

    public String getKey() {
        checkSpecifiedProperty("key");
        return convertEmptyToNull(key);
    }

    public void setKey(String value) {
        registerModifiedProperty("key");
        this.key = value;
    }

    public String getValue() {
        checkSpecifiedProperty("value");
        return convertEmptyToNull(value);

     *
     * @return cache key
     */
    String getKey();

    /**
     * Set the cache key for this referral
     *
     * @param key
     *            cache key
     */
    void setKey(String key);

    /**
     * Set the cache map for this referral
     *
     * @param map the cache map to associate with this referral
     */
    void setCacheMap(Map<String, DfsReferralDataInternal> map);

                (et, vl) -> ((CrawlingInfoParam) et).setCreatedTime(DfTypeUtil.toLong(vl)), "createdTime");
        setupEpg(_epgMap, et -> ((CrawlingInfoParam) et).getKey(), (et, vl) -> ((CrawlingInfoParam) et).setKey(DfTypeUtil.toString(vl)),
                "key");
        setupEpg(_epgMap, et -> ((CrawlingInfoParam) et).getValue(), (et, vl) -> ((CrawlingInfoParam) et).setValue(DfTypeUtil.toString(vl)),
                "value");
    }